Imported prior to the ban ... that would be kind of iffy. You would think they would have re-exported the goods for a refund or product they could sell legally, unless inventory was so small that returns would have been cost prohibitive ...
And I don't recall when the Act went into effect (it's been at least twenty years since we started harping about your seals, hasn't it?), the factor of time would have to be considered ...

Can anyone guess what I do when I'm not on vacation?